PAF Education Instructor Physics Solved MCQS Test Preparation download in pdf from past papers
1. The S.I. unit for intensity of light is;
candela
2. The number of base units are;
Seven
3. Two forces of magnitude F act perpendicular to each other. The angle made by resultant force with the horizontal will be
45 degree
4. S.I unit of solid angle is
ste-radian
5. The horizontal component of a projectile throughout its motion
remains constant
6. When the body is moving with constant acceleration then instantaneous acceleration is equal to
Average acceleration
7. The total change in momentum of an isolated system is
zero
8. When heavy body collides elastically with light body at rest, velocity of light body after collision
becomes double
9. K.E can be defined as the dot product of
avg. momentum and velocity
10. 15 joules of work is done in 5 s, the power is equal to
3 watt
11. If speed of a body is doubled, then its K.E
becomes four times
12. The escape velocity of the object from the earths is
11 km/s
13. When a body is rotating with constant angular velocity, it tangential acceleration is
Zero
14. A diver changes his body position to conserve the
angular momentum
14. When a body is moving in upward direction with an acceleration ‘a’, it apparent weight
increases
15. Which of the following has minimum viscosity
air
16. The device used for the measurement of liquid flow is
venturi meter
17. The low value of the normal human blood pressure is called
Diastolic pressure
18. The speed of sound is greater in solids due to high
elasticity
19. The waves of equal frequency traveling in opposite direction give rise to
stationary waves
20.At the open end of an organ pipe
anti-node is formed
21.Fixed ends of a vibrating string are
nodes
22. The velocity of light was determined accurately by:
Michelson
23. In case of point source the shape of wave front is
spherical
24. The phenomena of interference of light is a
wave characteristics
25.The least distance of distinct vision for a normal eye is
25 cm